Did it occur to you that marching bands normally play marching songs and that may be the reason why they are called marching bands? I first saw a marching band in one military parade in the streets. During my younger days, the military (army band) goes to the streets one day in a year to promote their public relations. Obviously, all their music are marching music that children would follow the parade up to the next block. However, it’s not the case anymore because most marching bands play the modern songs particularly the popular songs of the era. If you know Gangnam Style, that was very popular last decade, it was also popular with marching bands.